KR20140024642A - Transparent display with excellent visibility using pdlc film - Google Patents

Transparent display with excellent visibility using pdlc film Download PDF

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Publication number
KR20140024642A
KR20140024642A KR1020120090887A KR20120090887A KR20140024642A KR 20140024642 A KR20140024642 A KR 20140024642A KR 1020120090887 A KR1020120090887 A KR 1020120090887A KR 20120090887 A KR20120090887 A KR 20120090887A KR 20140024642 A KR20140024642 A KR 20140024642A
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South Korea
Prior art keywords
liquid crystal
film
transparent display
dispersed liquid
polymer dispersed
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KR1020120090887A
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Korean (ko)
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김배인
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도레이첨단소재 주식회사
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Priority to KR1020120090887A priority Critical patent/KR20140024642A/en
Publication of KR20140024642A publication Critical patent/KR20140024642A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Dispersion Chemistry (AREA)

Abstract

The present invention relates to a transparent display with high visibility using a PDLC film and, more particularly, to a transparent display with high visibility using a PDLC film capable of protecting privacy which is easily exposed and providing high visibility. For this, the transparent display with high visibility using the PDLC film according to the present invention includes a transparent display part and the PDLC film which is formed on the rear of the transparent display. An air gap is formed between the transparent display part and the PDLC film.

Description

Transparent display with excellent visibility using polymer dispersed liquid crystal film {TRANSPARENT DISPLAY WITH EXCELLENT VISIBILITY USING PDLC FILM}

The present invention relates to a transparent display having excellent visibility using a polymer dispersed liquid crystal film, and more particularly, to a transparent display having excellent visibility using a polymer dispersed liquid crystal film capable of protecting privacy with excellent visibility. will be.

In general, flat panel display devices have been designed and developed to realize a wide viewing angle as much as possible in order to clearly recognize an image from any angle. As a result, current flat panel display apparatuses have reached a very good level with almost no problem in viewing angle. In addition, the field of application of flat panel display devices continues to increase, and in particular, flat panel display devices are used as one of user interfaces in most electronic devices and mobile devices.

Transparent display, which is a hot spot in the display field, which has continued to grow rapidly, can solve the spatial and visual constraints of existing electronic devices by implementing functions of information recognition, information processing, and information display as transparent electronic devices. Such transparent electronic devices can be used for u-IT smart windows, and smart windows can be applied as windows for smart homes or smart cars.

The transparent display refers to a display made optically transparent using a transparent oxide semiconductor film. The transparent display is manufactured based on a transparent transistor, a transparent electrode, and a transparent dielectric, and implements the function of information display in a transparent panel, thereby limiting the spatial / temporal limitation of the existing display. There is an advantage that can be solved.

Among these, the transparent display technology using LCD has an edge type backlight, but the transmittance remains at 5.32%, and the moire (interface) between the metal mesh electrode and the BM and LGP pattern is applied. In addition, there is a technical shortcoming of moire phenomenon, and transparent display technology that combines LTPS and AMOLED has high power consumption compared to LCD with 100W (32 "standard), and it is difficult to express true black. In contrast, there is no problem in the display contrast ratio in a dark environment, but has a fundamental disadvantage as a transparent display in which the contrast ratio is degraded in a general environment with light.

In addition, the transparent LCD using the LCD technology has a disadvantage that the transparency is lowered by the polarizing plate used for the black (black) implementation, and has a disadvantage for the outdoor visibility.

In addition, the transparent display, which combines a TFT array without a color filter and a polymer network liquid crystal film, realizes a screen through a single color in the case of a transmissive display mode and a color screen through a projector. .

In the case of the transparent display, the transmittance of impermeability is 4% and the transparency of transmission is 47%, which is impossible to realize black color fundamentally. Also, the response speed is 74 msec. Visibility is bad.

6 is a cross-sectional view illustrating a structure of a conventional transparent display device, and FIG. 7 is a cross-sectional view illustrating an operation state of a conventional transparent display device, and illustrates a transparent organic light emitting diode display device among transparent displays. 6 and 7, the transparent organic light emitting diode (TOLED) 10 includes a transparent anode 3 and a hole transport layer on a glass substrate 2 of the TFT layer. A hole transport layer 4, an emitting layer 5, an electron transport layer 6, a transparent cathode 7 and the like. Here, the TFT layer is provided with a TFT layer provided with a substrate, a gate electrode, a source region, a drain region, a via hole, and the like (not shown).

Accordingly, a voltage is applied to the gate electrode, a channel is opened in the organic semiconductor region, and a current flows from the source region to the drain region. Then, the transparent anode 3 of the transparent organic light emitting diode 10 is continuously passed through the via hole. Current flows through the hole transport layer 4, the emitting layer 5, the electron transport layer 6 and the transparent cathode 7. . At this time, in the light emitting layer 5, the action according to the energization, that is, holes and electrons are coupled and excited to cause the light emitting action of emitting energy in the form of light. This light becomes, for example, a light emitting point corresponding to one pixel of the display panel.

Meanwhile, as illustrated in FIGS. 6 and 7, there is an upward emission type that emits light in a direction opposite to the downward emission type that emits toward the substrate based on the emission direction. The upward light emission type is a trend. That is, in the downward emission type, light can be emitted only as much as the area of the gate electrode, but in the upward emission type, light can be emitted to a wider area between black matrices (not shown). The cathode must be transparent. That is, conventionally, cathodes were used in a structure in which ITO (indium-tin oxide) and silver (Ag) were stacked one by one.

This is a thin layer of silver which is a metal, and transparent ITO is laminated on it to a suitable thickness. It is a mixture of the conductivity of the metal and the light transmittance characteristics of the ITO. The thickness of silver is usually about 5 nm, and the transparent ITO is set to a thickness of about 50 to 200 nm.

In addition, the light must be well transmitted, and at the same time, the conductivity must be maintained at an appropriate level so that power consumption does not increase too much. Therefore, ITO and metal, which have these two properties, are laminated.

However, the conventional transparent organic light emitting diode may have an advantage of simultaneously looking at the back side, but in some cases, there is a problem that the visibility is lowered or the background is disturbed.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a transparent display having excellent visibility using a polymer dispersed liquid crystal film which is excellent in visibility and can protect privacy easily exposed. .

These and other objects and advantages of the present invention will become more apparent from the following description of a preferred embodiment thereof.

The object of the present invention includes a PD display film formed on a transparent display and a rear surface of the transparent display, and an air gap is formed between the transparent display and the PD LCD film. Achieved by the display.

Here, the interval of the air gap is characterized in that 0.1 to 2mm.

Preferably, the PDLC film has a polymer dispersed liquid crystal composite film in which a plurality of liquid crystal droplets are dispersed in a polymer dispersion, a substrate disposed on upper and lower surfaces of the polymer dispersed liquid crystal composite film, and a conductive material deposited on the substrate. Characterized in that the transparent conductive film.

Preferably, one conductive material of the transparent conductive film is characterized in that it further comprises an etching.

Preferably, the polymer dispersion comprises 0.1% to 20% by weight of polyfunctional oligomer, 0.1% to 99% by weight of diluent, 0.1% to 99% by weight of crosslinking agent and 0.1% to 99% by weight of photoinitiator. It is done.

Preferably, the diluent and the crosslinking agent are characterized in that it has a composition ratio of 30: 1 to 99: 1.

Preferably, the multifunctional oligomer is a urethane-based methacrylate derivative compound derived from hydroxypropyl methacrylate, the diluent is 2- (2-ethoxyethoxy) ethyl acrylate, and the crosslinking agent is 1, At least one selected from 6-hexanediol diacrylate and polyethylene glycol dimethacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propan-1-one.

Preferably, the polymer dispersed liquid crystal composite film has a thickness of 5-30 micrometers (μm).

According to the present invention, it is possible to protect privacy that is excellent in visibility and easy to be exposed.

1 is a perspective projection of the transparent display excellent visibility using a polymer dispersed liquid crystal film according to an embodiment of the present invention.
2 is a cross-sectional view taken along line A-A 'in Fig.
3A and 3B are cross-sectional views illustrating the structure of a polymer dispersed liquid crystal (PDLC) film, respectively, in which FIG. 3A is a case in which no driving voltage Vd is applied to the PDLC film, and FIG. 3B is a driving voltage Vd in the PDLC film. ) Is approved.
4 is a cross-sectional view of a patterned polymer dispersed liquid crystal film according to an exemplary embodiment of the present invention.
FIG. 5 is a plan view illustrating an etching portion in which a conductive material is etched in FIG. 4.
6 is a cross-sectional view showing the structure of a conventional transparent display device.
7 is a cross-sectional view illustrating an operation state of a conventional transparent display device.

Hereinafter, the present invention will be described in detail with reference to embodiments and drawings of the present invention. It will be apparent to those skilled in the art that these embodiments are provided by way of illustration only for the purpose of more particularly illustrating the present invention and that the scope of the present invention is not limited by these embodiments .

1 is a conceptual view illustrating a perspective projection of a transparent display having excellent visibility using a polymer dispersed liquid crystal film according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1. 1 and 2, the transparent display having excellent visibility using the polymer dispersed liquid crystal film according to the present invention includes a transparent display 100 and PD C film 300 configured on the back of the transparent display, the transparent display An air gap 200 is formed between the 100 and the PDLC film 300.

The transparent display 100 refers to a display which is characterized by the display itself having a certain degree of transparency and the back side of the screen. The transparent LCD display maximizes the transmittance of the existing LCD and realizes the function of having the function of the transparent glass window and the display at the same time so that the information displayed and the background of the display can be obtained simultaneously. Compared with the existing LCD display, the BLU part is eliminated, and thus, the material usage is greatly reduced. As a side note, the energy savings and mercury used in traditional CCFLs are eliminated.

In the specification of the present invention, the present invention is generally described through the "organic light emitting diode display device" as a transparent display, but there is no transparent display utilizing the LCD, a transparent display incorporating LTPS and AMOLED, or no color filter. Applicable to a variety of transparent displays, such as a transparent display that combines a TFT array and a polymer network liquid crystal film.

In order to improve visibility, which is a disadvantage of the conventional transparent display, the polymer dispersed liquid crystal film according to the present invention is provided with a polymer dispersed liquid crystal film, that is, the PDLC film 300 having an air gap 200 at the rear of the transparent display 100. According to the transparent display having excellent visibility, when the voltage is applied to the polymer dispersed liquid crystal film 300, the film becomes transparent to implement the basic characteristics of the transparent display 100, and the polymer dispersed liquid crystal In a state in which no voltage is applied to the film 300, the PDC film 300 exhibits scattering characteristics and blocks an external visibility deterioration factor, thereby realizing an improvement in visibility. In addition, in the transparent state, the image on the transparent display can be observed by others, so if you want to protect your privacy, you can supplement your privacy by blocking the voltage on the polymer dispersed liquid crystal film. Will be.

In addition, the interval of the air gap 200 according to the present invention is preferably 0.1 to 2mm. When the air gap is less than 0.1 mm, the visibility of the transparent display is inferior because it is the same as the absence of the air gap. That is, the PDLC film has a transmittance of 40 to 60% even when the electric field is off, so that the transmittance is high when the electric field is almost in close contact with the transparent display, so that the electric field may be similar to the on state. This is because it is impossible to achieve the purpose of implementing the PDLC film. In addition, when the air gap exceeds 2 mm, since light is introduced in four directions of the display, interference occurs, which also adversely affects the visibility of the transparent display.

In addition, the PDLC film 300 of the transparent display having excellent visibility using the polymer dispersed liquid crystal film according to the present invention includes a polymer dispersed liquid crystal composite film in which a plurality of liquid crystal droplets 40 are dispersed in the polymer dispersion 30. It is characterized in that the transparent conductive film having a substrate (11, 21) and the conductive material (12, 22) deposited on the substrate respectively provided on the upper and lower surfaces of the polymer dispersed liquid crystal composite film.

3A and 3B are cross-sectional views illustrating the structure of a polymer dispersed liquid crystal (PDLC) film, respectively, in which FIG. 3A is a case in which no driving voltage Vd is applied to the PDLC film, and FIG. 3B is a driving voltage Vd in the PDLC film. ) Is approved. 3A and 3B, the principle of PDLC utilizes anisotropy of liquid crystal. Liquid crystals show anisotropy of phase and abnormal refractive indices, while general polymers show isotropy. In the case of an electroless field, the dispersed liquid crystal has a non-uniform orientation of molecules, resulting in a difference between the refractive index of the polymer and the refractive index of the liquid crystal droplet. For this reason, scattering occurs between the polymer and the liquid crystal, which causes the PDLC film to appear opaque. However, in the case of an electric field, the liquid crystal molecules are oriented in a direction parallel to the electric field, and the refractive index of the polymer and the phase refractive index of the liquid crystal are coincident so that the PDLC film becomes transparent.

The PDLC film uses the difference in refractive index between the liquid crystal and a general polymer material to visually recognize the transparency and opacity by applying an electric field. And harden so that the electric field can be maintained. In general, the polymer dispersed liquid crystal film is applied by applying a positive charge to one surface of a conductive material and applying a negative charge to one surface of another conductive material to maintain an electric field in the liquid crystal so that the liquid crystal is aligned in a predetermined direction. The liquid crystal film appears transparent and then appears opaque. In this case, the entire surface of the film is repeated the same transparent or opaque.

4 is a cross-sectional view of a patterned polymer dispersed liquid crystal film according to an exemplary embodiment of the present invention, and illustrates a case in which a driving voltage Vd is not applied. Referring to FIG. 4, the patterned polymer dispersed liquid crystal film according to the present invention has a polymer dispersed liquid crystal composite film in which a plurality of liquid crystal droplets 40 are dispersed in a polymer dispersion 30 and an upper and lower surfaces of the polymer dispersed liquid crystal composite film. And a transparent conductive film having substrates 11 and 21 installed on the substrate and conductive materials 12 and 22 deposited on the substrate, wherein one conductive material 22 of the transparent conductive film is an etching portion 22b. It is characterized by comprising:

A transparent conductive film having substrates 11 and 21 and upper and lower surfaces of the polymer dispersed liquid crystal composite film and conductive materials 12 and 22 deposited on the substrate, respectively, includes a plurality of liquid crystal droplets 40 in the polymer dispersion 30. ) Is for applying an electric field to a polymer dispersed liquid crystal composite film in which?) Is dispersed. To this end, the transparent conductive film is connected to a power supply unit 60 for applying a predetermined driving voltage (Vd), the on / off operation of the power supply unit 60 is controlled by the controller 70 Can be. For example, the controller 70 may control the operation of the power supply unit 60 by receiving a signal from the user.

As described above, when the driving voltage Vd is not applied to the transparent conductive film by the power supply unit 60, the dispersed liquid crystal 40 does not have a constant orientation of molecules, and thus the refractive index of the polymer dispersion 30 and the liquid crystal ( The difference in the refractive index of 40) is obtained (see FIG. 3A). On the other hand, when the driving voltage Vd is applied by the power supply unit 60, the liquid crystal 40 aligns molecules in a direction parallel to the electric field, and the refractive index of the polymer dispersion 30 and the refractive index of the liquid crystal 40 coincide. (See FIG. 3B).

The patterned polymer dispersed liquid crystal film according to the present invention having such a structure engraves a specific pattern and repeats the transparency and opacity according to whether the pattern is applied to an electric field. That is, the etching portion 22b illustrated in FIG. 5 is composed of letters, pictures, or other patterns, and one transparent conductive film has a conductive material 22 deposited thereon in a desired pattern using laser equipment or chemical etching equipment. Etching portion 22b and non-etching portion 22a, which are etched portions, are provided, and conductive material 12 deposited on another transparent conductive film is not etched.

In this configuration, when an electric field is applied to the polymer dispersed liquid crystal film by applying positive charge to the transparent conductive film having the etching portion 22b and applying negative charge to the transparent conductive film having no etching portion. Since the conductive material does not exist in the etching part 22b having the pattern where the conductive material is etched, it is recognized as opaque because no electric field is applied, and the non-etching part 22a is not etched so that the conductive material exists. As the electric field is applied and recognized transparently, the specific pattern forming the etching part is repeated transparent and opaque so that the desired pattern can be displayed in a shiny manner without the specific display desired, and thus it can be applied as an advertisement or a display for display.

In addition, the polymer dispersion 30 according to the present invention is 0.1 wt% to 20 wt% of the multifunctional oligomer, 0.1 wt% to 99 wt% of the diluent, 0.1 wt% to 99 wt% of the crosslinking agent, and 0.1 wt% to 99 wt% of the photoinitiator. It is characterized by including. Preferably, the diluent and the crosslinking agent of the polymer dispersion 30 have a composition ratio of 30: 1 to 99: 1.

This means that in the composition of the polymer dispersion 30 according to the present invention, if the content of each component is not blended at a predetermined ratio as described above, the driving voltage is increased due to the deterioration of the characteristics of the support of the liquid crystal composite film and the contrast ratio is reduced to the display. It is not desirable because it becomes difficult to implement. In particular, when the ratio of the diluent and the crosslinking agent is less than 30: 1, since the content of the diluent is too low as compared with the crosslinking agent, the driving voltage increases, which is not preferable.

In addition, the polyfunctional oligomer of the polymer dispersion 30 is a urethane-based methacrylate derivative compound induced by hydroxypropyl methacrylate, the diluent is 2- (2-ethoxyethoxy) ethyl acrylate, The crosslinking agent is at least one selected from 1,6-hexanediol diacrylate and polyethylene glycol dimethacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propan-1-one. It was confirmed through various experiments that the present invention is the most desirable to achieve the object.

In addition, in order to satisfy the constant transmittance of the patterned polymer dispersed liquid crystal film according to the present invention, it is important to control the thickness of the liquid crystal layers 30 and 40 which are polymer dispersed liquid crystal composite films to a predetermined thickness or less. It is preferable that the thickness of the said polymer dispersed liquid crystal composite film is 5-30 micrometers (micrometer).

Since transparent displays can show excellent characteristics in design and performance, they are expected to replace a large part of the existing display market, and when transparent display overcomes the problem of visibility and security, the first area to be commercialized is mobile devices. Among other things, it is expected to be a mobile phone. In addition, in the case of a small game machine, if a transparent display is adopted, it is possible to apply a new user interface (UI) in addition to the advantages of design, so that it can be applied in many fields.

In addition, the new display market is more flexible and newly applicable to products that have not been applied to the display, such as construction, advertising, and public use, and thus, the overall display market size can be further increased.

In the present invention, by applying the polymer dispersed liquid crystal film to the back of the transparent display to improve the visibility, the contrast ratio is 190 or more before the voltage is applied to the polymer dispersed liquid crystal film, but the voltage is applied to the polymer dispersed liquid crystal film. After the application, the contrast ratio is over 420, the combat ratio is over 80%, the reflectance is under 8%, and the haze is 6 or less. I can do it.

It is to be understood that the present invention is not limited to the above embodiments and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

2: substrate of TFT layer 3: transparent anode
4 hole transport layer 5 light emitting layer
6: electron transport layer 7: transparent cathode
11, 21: substrate 12, 22: conductive material
22a: non-etching portion 22b: etching portion
30: polymer dispersion 40: liquid crystal droplets
50: adhesive layer 60: power supply
70 control unit 100 transparent organic light emitting diode
200: air gap 300: PD C film

Claims (8)

In a transparent display having excellent visibility using a polymer dispersed liquid crystal film,
With transparent display,
A PDLC film configured at the rear of the transparent display,
An air gap is formed between the transparent display and the PDLC film. The transparent display having excellent visibility using a polymer dispersed liquid crystal film. The method of claim 1,
The gap of the air gap is 0.1 to 2mm, characterized in that the transparent display with excellent visibility using a polymer dispersed liquid crystal film. The method of claim 1,
The PDLC film includes a polymer dispersed liquid crystal composite film in which a plurality of liquid crystal droplets 40 are dispersed in the polymer dispersion liquid 30, and substrates 11 and 21 disposed on upper and lower surfaces of the polymer dispersed liquid crystal composite film, respectively. A transparent display having excellent visibility using a polymer dispersed liquid crystal film, characterized in that the transparent conductive film having a conductive material (12, 22) deposited on the substrate. The method of claim 3,
One conductive material (22) of the transparent conductive film further comprises an etching portion (22b), excellent visibility using a polymer dispersed liquid crystal film. The method according to claim 3 or 4,
The polymer dispersion 30 is characterized in that it comprises 0.1% to 20% by weight of polyfunctional oligomer, 0.1% to 99% by weight of diluent, 0.1% to 99% by weight of crosslinking agent and 0.1% to 99% by weight of photoinitiator. Transparent display excellent in visibility using the polymer dispersed liquid crystal film. 6. The method of claim 5,
The diluent and the crosslinking agent have a composition ratio of 30: 1 to 99: 1, characterized in that the transparent display with excellent visibility using a polymer dispersed liquid crystal film. 6. The method of claim 5,
The polyfunctional oligomer is a urethane-based methacrylate derivative compound derived from hydroxypropyl methacrylate, the diluent is 2- (2-ethoxyethoxy) ethyl acrylate, and the crosslinking agent is 1,6-hexanediol At least one selected from diacrylate and polyethylene glycol dimethacrylate, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-propane-1-one. Transparent display with excellent visibility. The method according to claim 3 or 4,
The polymer dispersed liquid crystal composite film has a thickness of 5-30 micrometers (μm), wherein the transparent display having excellent visibility using the polymer dispersed liquid crystal film.
KR1020120090887A 2012-08-20 2012-08-20 Transparent display with excellent visibility using pdlc film KR20140024642A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101520396B1 (en) * 2014-12-16 2015-05-14 (주)넥스트글라스 Mnaufacturing method of electronic blind
WO2019050252A1 (en) * 2017-09-05 2019-03-14 주식회사 네이션스 Privacy protection device for display devices capable of switching between wide viewing angle mode and narrow viewing angle mode

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101520396B1 (en) * 2014-12-16 2015-05-14 (주)넥스트글라스 Mnaufacturing method of electronic blind
WO2019050252A1 (en) * 2017-09-05 2019-03-14 주식회사 네이션스 Privacy protection device for display devices capable of switching between wide viewing angle mode and narrow viewing angle mode

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